Roving-clamp for spinning-machines.



G, ROBERTS.

HQVING CLAMP FOR SPINNING MAGIHNES.

.APPLICATION FILED MA1-LH, 1914- Patenied Sept. 15, MM.

2 SHEETSQSHEET l.

, fn. n E Vul-Macaw G. I" ROBERTS. ROVING CLAMP FOR SPINNING MACHINES.

APPLJATION FILED 151511.11, 1914.

Patented Sept. 15, 1914.

2 SHEETS-SHEET 2.

nur ernten.

ons r. ROBERTS, or rains, vrnomm.

" ROVING-CLAMP FOR' SPINNING-MACHINES.

enthlt., f

My invention relates to the devices cui-.-

ployedin spinning machines for effecting a second breakage of the roving on the receiving side ofv the drawing lroll-s whenever vthe thread has been broken or .becomes slack lon the delivery side thereof.

As isV well understood, such devices are employed for-the purpose of preventing the waste of 'roving or damage to the rolls when the threads break between the rolls and the spindles which normally receive them.

' In such mechanism the roving usually passes from bobbins carried by' a creel through guides'` carried by a `reciprocating traverse lia-rito the drawing rolls and then to guides formed on the ends of wires wl'iich are .so connected with devices -for breaking the thread at the rear side of the drawing rolls that normally while the machine` is in operation said clamps or breaking devices are inoperatiiye, but the arrangement is: such that-,when a threadvbreaks on the delivery sideof the rollssaid wire, or as vit is generallyl called drop wire which is normally heldfelevated bythe thread. -will drop 'andv canse the clamp .or thread-breaking devices.

to operate to break .the roving at the receiving .side ofthe drawing rolls and thus stop| the feed of Vroving through the rolls and prevent the piling In such. machines the .threads after passying from the drop wires usually pass through guides arranged over spindles on which the thread is wound. i

In my U. S. Patent No.y 1,088,036, of Feb. 24,1914 I have shown novel mechanism of this kind .which -is very. sensitive in operation and is of such nature that the drop wire has a thread-engaging endwhich is so balanced as to merely malte .lateral `contact with the thread without exerting a vertical strain. thereon, and which drop w'reis Yffii@tinted in bearings in such manner that it `moves about an axis transverse to the aXes ofthe drawing rolls. Such a device has been 'found tobe most ellicientin operation.

Specification of Letters Patent.

up of threads or the Vsection thereof.

entanglement thereof with the. mechanism. i A l vplied to drawing rolls of usual constructlon:

These rolls A are supported on `a roll beam Patent-ea sept. i5, 1914.

application mea March 11.1914. serial no. 823,963.

thethread from the rolls passes is made ad- Justablel ni order that it may be properly related to the thread and the thread-engag ing end of the drop wire is so constructed that the thread may be easily engaged there with when taut lbut cannot be easily disengaged therefrom when the thread is loose. I also provide means supported on the traverse bar by which the roving clamps may be held up or out of engagement. with A and 'the thread is being properly passedto the spindles. Fig. 2 is a perspective View illustrating the construction of the clampv `proper and the devices for supporting andoperating it. Fig. 3 is a detail view inv perspective, showing devices for securely fastening the frame of the roving clamp to the traverse bar. 'F ig. 4 is a detail view in perspective of the end of the dropwirewhich is engaged by the thread issuing from the drawing rolls. Fig. 5 shows a section-on the line 5- 5 of Fig. 4. Fig. 6 shows a section on .the line 6-6 of Fig. 4. Fig. 7 is a perspective view of the front portion of the bearing for the drop wire. Fig. 8 showsan elevation thereof. Fig. 9 isa detail View` in perspective of the devices for h'olding the roving clamps in their elevated position during dotling. ,Fig 1 0 is a detail view in The drawingsshow my improvements ap- B by standards C in the usual way. The traverse bar D which isl operated in the v'usual manner isarranged in rear of the drawing rolls, and on this bar in rear of each of the rolls is secured a frame E, providedat itsupper end with a guide e while at its-lower'end-it'is bent or doubled at e and carried upwardly and then rearwardly,

as indicated at. @2, where it is again bent upwardly at e3.

ln order to securely fasten the frame E to the traverse bar I bolt it 'thereto at d, but as`- the bolt may loosen I provide an additional attaching device consisting of abent wire l, having a top por- The part of the drop wire through which. .tionA v 3) lwh'iclli'-, extendsV above the traverse har and over the upper portion Z of the frame. E. This upper portion of the wire clip is .iotmed with vertical portions i', which extend down in front of the traverse bar and connect with rearwardly extending portions 2 whichproject under the traverse bar and. are bent slightly upward on the front side of said bar. This wire clip is so applied to the traverse bar and to the frame E that the trame is securely fastened to the traverse bar and even should the bolt loosen -there is no danger ott the frame being dis placed.

The roving clamp Gr is pivoted at g to a bracket F which atl its lower rear end is doubled at f and formed with an upwardly projecting portion f provided with an eye f2 for the roving X; Thebracket is Yadjust-y ably secured to the upwardly projecting portion e3 of the trame E by a bolt I-I eX- tending through a slot-Zz in said upwardly projecting portion e3 and engaging said bracket. In thisway the bracket may be adL justed vertically to give the desired vertical adjustment to the clamp and to thus vary its position with reference to the rodO which operates it. In this way also the eye f2 is at. all times retained in a plane coincident with that of the top ofthe bracket. It will be observed that when 'the bracket with the clamp is verticallyadjusted the eye f2 is correspondingly adjusted so that the relation between the clamp, the bracket-,and theeye is always maintained the same.

The clamp G is operated by the rod O above referred to and which is shown in perspective in Fig. 2. This rod is connected to the crank n formed on the rear end of the drop wire L. As shown in Fig. 2 the rod O has a substantially horizontal portion 0 vconnecting with a substantially vertical portion o which is bent at o2 and projected upwardly at 03 where it passes through a hole 04 in the bracket F in such manner that when the rod is moved vertically it will cause the clamp Gr to rise and :ii-all. By forming the rod in themanner shown the frame E is cleared; that is, the

@rod does not come in contact with the frame 5.10

:t produce any undue friction or binding "and yet the rod is properly guided in the bracket and engages the rovingpclamp in such manner as to normally hold 1t in an 'elevated position. Vhen the drop wire is released by the thread it turns easily in its bearings and the rod O descends without undue friction and' allows the-roving clamp to drop of its own weight and engage the roving. By bending the rod O in thc manner specified away from the crank arm the weight of the rod is applied vertically to the crank arm and assists in the operation of applying the clamp to the roving.

The drop wire L yis mounted to move about an axis transverse tu the axes of thev drawing rolls. Its rear bearing consists of a plateR attached to the trarne E. The front bearing of the drop wire consists of a bar M firmly attached by the nuts m to the frame E extending forwardly therefrom and bent at m2 and extending downwardly as shown. ln this way space is left beneath the front drawing rolls to accommodate a cleaning roll when such is required.'

I have found that it is desirable to pro vide some means for adjusting the front bearing of the drop wire vertically invorder that its thread-engaging end vmay be propverly related to the thread.

Inasmuch as .the mechanism is supported entirely on the traverse bar the relation be tween the engaging end of the drop wire and the thread may vary and an adjustment of this relation is desirable. For the purpose of vthis adjustment I preferably provide. aplate M, having an aperture m4 through which the drop wire L passes and vhaving a slot 29 to accommodate a set screw P which engages the downwardly projecting portion m of the rod lvl. This rod slotted at m to accommodate the drop wire, and the arrangementis such that 4by adjusting the plate M up or down the thread-engaging end L of the drop wire may be raised or lowered as occasion may require.

a guide U to a 'spindle V in the usual way. This guide U is raised during do'ling'and it may be hinged at 'u for this purpose. The drop wire lis sorelated to the drawing rolls and to the guide U that the thread T normally passes through the thread-engaging en'd of the drop wire in such `manner as to exert no vertical strain or weight. thereon but during doing or when I the guides U are raised the threads will be raised also out of their normal position and will become loose and might become disengaged from the drop wires and delay thev operation In .order to prevent this, I form the thread-engaging endsV of the drop wires in the manner indicatedv in Fig. 1 and also in Figs. 4 to 6, inclusive. As shown, the drop wire is bent upwardly at its front end., forming a front portion Z, Zf which is bent at its upper end y with an intervening space between the parts Z, Z2. The wire is bent again at Z4, forming a lower loop at this point and then is continued upwardly at Z3., being made to enter the space between the parts Z, Z2, asvindicated in Figs. 4 and Normally the thread T passes .freely through the lower portion of the thread-engaging end L of the drop wire, as indicated in Figs. 1 and 6 and barely touches said thread-engaging end but if the thread becomesfl'oose or is raised, as when the guide U is elevated, it will pass into engagement with the members 3-12, z8, sa nficnea in ing. 5. This engagement is such as to preventthe thread lThe 'thread T` passes from the drop wire throgh i/,oiaaa from easily passing out ofthe drop wire. The `thread being in `a 4loose 'condition at this time. it will be detained in engagement l with they drop wire.` AFurtherinore, the construction is such, as clearly shown in Fig. si, that a thread while being rotated or twisted7 and `being drawn rapidly forward may v,easily kbe brought into engagement with the `thread-engagin'gk end L.v l have found this construction of drop wire most etlicient in operation and this particular construction may be used in drop wires of various kinds. wlVhen lthe ,machine is being doded and whentheV thread is loose, it is desirable to holdjthe drop wires in an elevated position, said Wires at this time not being so held by the thread itself. For this purpose l pro` vide the holding or locking devices shown in Figs. 19 and 10 of the drawings. Below the plane of the traverse bar D and in rear thereof I mount a horizontally' varranged shaft' S which may extend from one end of the spinning frame to theother past several sets of drawingrolls. This shaft may be supported in brackets S', a suitable number being provided for the purpiose arranged at suitable intervals apart.

number of frames E in the manner shown. Each bracket, as shown in Fig. 9, is provided with apart s through which the 4rear end of the rod M extends and'this part of the bracket S is held on said rod M and in -en gagement with the frame E by one of the nuts ted lines in Fig.. llbut when the machine is being doii'ed it may be moved to the position shown by full lines' and made to engage a suitable cat-ch or-latch S3 carried by the creol member'or creel frame J. rl`he shaft S vcarries drop wire-engaging arms K, shown most clearly in Figs. Qand l0. lOne such arm is provided foreach drop wire and said 'arm is'preferably constructed of thin 'sheet metal in order to make it lightA and thus not unduly increase the* total weight carried by the traverse '.bar. Preferably each such arm comprises a portion 7a which is bent around the lshaft S and then doubled at la to thicken it'and provide a firm hold for the screw 7a2 which serves to clamp the arm on lthe shaft. The outer end of Jthe arm is bent upwardly at 7f3 and notched at la* for the purpose of readily engaging the crank arm n of the drop wire. ln th@ normal operation of the machine the dro'p wire hold' ing devices do not .engage the drop wires but .when the machine is beingmdoiied-the operatingrod S2 `is turned to the position shown in Fig. '-1, made to engage the-latch S and Vin this position it will hold the `drap ach of said` brackets is firmly attached to a suitable wires in an elevated position and will` also operating rod S2 is moved to the position shown by' dotted lines in Fig. l and the drop wires are then all held up by the thread whichis then under tension and rapidly being fed jrorward to the spindles l).

lt will be noted that in my improved mechanism the clamps operate on the roving at a considerable 'distance :from the drawing rolls and not close thereto in some prior machines.

lt will also be noted" that when the bracket l" is adjusted vertically on theA frame E the eye f2, is correspondingly adjusted so that the guiding eye alwaysy maintains the same relative position to that part of the bracket over which the roving passes and on which it is clamped.

l claim as my invention l.. The combination with of a spinning machine, of a clamp for the roving in rear oi the rolls, a drop wire having a. thread-engaging end formed by bending the wire to provide a loop Athrough the drawing rolls which the thread freely passes and a free I 'yielding portion for closing the loop at its upper end.

2. rlhe combination with the drawing rolls of a spinning machine' of a clamp for. the

roving in rear of the rolls, a drop wire having a thread-engagingnd formed by bending the wire to provide ythree vertical por- Jrions. the middle one oi' 'which extends to a position between the. other two.

3.' The combination with the drawing rolls of a spinning machine of a clamp for the roving in rear oit the rolls. a drop wire hava thread-engaging end in front of the rolls which is so balanced as togmerely make lateral contact with. the thread withoutexerting a vertical strain thereon, bearings in which the drop wire is mountedv to move about an .axis transverse to the aXes'of the drawing rolls, connections between the drop wire and the Aclamp whereby the latter is normally held out of engaging position with the rovingbut which allows the clampA to engage the roving when the thread issuing from the rolls breaks, and means for adjusting said bearings vertically to raise and lower the' thread-engaging end of the dropl wire.

ii. The combination with the drawing rolls of a spinning machine of a clamp for the roving in rear of the rolls, a drop wirehaving a thread-engaging end infront of the rolls., a rear bearing for the drop wire and a front bearing for said wire,A comprising `a stationary member and a vertically adjust-` able member through which the wire el'xtends.

. Thecombination with the drawing tolls orf a spinning machine of clamp for the roving in rear of the rolls, a drop wire hav-V ing a thread-engaging end in front of the rolls, a rear. bearing for the drop wireand a front bearing for said drop wire, comprising a bar having a downwardly extending front portion and a vertically adjustable plate carried by said front portion.

6. The combination with the drawing rolls of a spinning machine of a clamp for the roving in rear of the. rolls, a drop wire having a thread-engaging end' in front of .the rolls, bearings in which the drop wire is mounted to move about an axis transverse to the axes of the drawing rolls, a crank on the rear end of the drop wire and a rod pivotally connected with the crank having a laterally projecting portion, a vertical portion extending upwardly from said laterally projecting portion, an inwardly projecting part at the upper end of said vertical portion and another vertically extending part adapted to engage the clamp.

7. The combination with the drawing rolls of a spinning machine o-f a reciprocating traverse bar, a frame bolted thereto, a wire clip for fastening the frame .to the traverse bar, a Clamp for the roving supported on said frame, and a drop wire also supported on said frame.

8. The combination with the drawing rolls of a spinning machine of a traverse bar, a frame securely fastened thereto, a bracket formed with aguideeye for the roving carried by said frame and vertically adjustable thereon, a clamp pivoted to said bracket, a drop wire also supported on said frame and having a crank arm at its yrear end, and a bent rod connecting said `crank with said clamp.

9. The combination with the drawing rolls of a spinning machine of a reciprocating traverse bar, clamps for the roving in rear of the drawing rolls, drop wires having thread-engaging ends in front of the rolls, connections'between the drop wires vand the clamps, clamp-supporting frames attached to the traverse bar, drop wire-supporting `barsM supported by said frames .and havingr. threaded ends extending through the frames, nuts on opposite sides of said frames for securing the supporting bars lto said frames, brackets (S) attached to said clampsupporting frames by the same nuts that attach the drop-wire-supporting bars to the frames, and means for holding the clamp out of contact with the drawing rolls during dofling comprising a shaft mounted to turn in said brackets (S), a series of notched arms carried by said shaft and adapted to engage the drop wires, an operating lever carried by said shaft, and a latch for holding the clamp in position when the shaft is operated to support the drop wires.

10. The .combination with the drawing rolls, of a spinning machine of a clamp for the roving, a reciprocating traverse bar, a

clamp-supj1 orting frame secured to the traverse bar, a bracket to which the clamp is pivoted which is formed with anguiding eye for the roving and which is adjustable vertically on theclamp-supporting frame, the

arrangement being such that when the bracket is adjusted vertically the guiding eye is coincidentally adjusted.

11. In a spinning machine the combination of the drawing rolls, a spindle to which the lthread passes froml the drawing. rolls, a guide for the thread arranged immediately over said spindle, a clamp-for the roving in rear of, the drawing rolls, a drop wire having a thread-engaging end in front ofjthe rolls and between them and said guide, donnections between the drop wire and the clamp, and a bearing for the drop wire supported by the traverse bar ofthe machine which is vertically adjustable to varyrfthe position of the thread-engaging end of the drop. wire.

In testimony whereof, I have hereunto subscribed my name. v

' GUS F. ROBERTS. Witnesses i f STURGIS C. PEC/K, WLLrAM P. Woon. 

